House votes to formalize impeachment inquiry procedures
By Alex Rogers, Jeremy Herb & Clare Foran
White House lawyer moved transcript of Trump call to classified server after Ukraine adviser raised alarms
By Tom Hamburger, Carol D. Leonnig & Greg Miller
Divided House passes impeachment probe resolution
By John Parkinson & Stephanie Ebbs
What is impeachment and how does it work? 10 facts to know.
By Frank Thorp, Frank Thorp V & Pete Williams
Trump impeachment: a timeline of key events so far
By Tom Mccarthy & Miranda Bryant